Towel bar



FIG. 1 is a perspective view of a towel bar according to the present invention, the elements of the fixture being shown in broken lines and thus not forming a part of the claimed design;

FIG. 2 is a front view thereof;

FIG. 3 is a back view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is top view thereof; and,

FIG. 7 is a bottom view thereof. 

The ornamental design for a towel bar, substantially as shown and described. 